Dietrich ("Didi") Thurau (; born 9 November 1954 in Frankfurt) is a retired German professional road bicycle racer. His biggest career achievements include winning the one-day classic, Liège–Bastogne–Liège, his home country's Deutschland Tour and surprising the field at the 1977 Tour de France by capturing four stages and holding the yellow jersey as leader of the general classification from the prologue for 15 days. Thurau did win the young rider classification although he lost the overall lead to eventual winner Bernard Thévenet. Thurau was German pursuit champion three times and won 29 six-day races. He is the father of former professional cyclist Björn Thurau. In 1989, he revealed he had doped throughout his career. Career He won the German National Road Race in 1975 and 1976. After his victory in the points classification in the Vuelta a España and a fourth place in the general classification in the Vuelta a España in 1976, Thurau was seen as a talented rider, but not seen as a rider for the general classification. This changed when he won the prologue 1977 Tour de France, won time trials and mountain stages, keeping the lead until far in the race, finishing fifth in the overall classification and won the young rider classification. Thurau signed a contract to ride the 1978 season as a team leader at IJsboerke. Before his contract started, but after he signed it, he rode the 1977 UCI Road World Championships. Seven kilometers before the finish, he was away together with Francesco Moser, and Moser punctured. To the surprise of commentators, including the coach of the French team Jacques Anquetil and Thurau's team leader Peter Post, Thurau waited for Moser, and was beaten in the sprint by Moser. This caused rumours that Thurau had sold the championship to Moser; it later became clear that Thurau's new bosses at IJsboerke did not want Thurau to ride in the rainbow jersey, but wanted him to keep his sponsored jersey. Thurau's primary goals for the next season became the 1978 Giro d'Italia and the 1978 UCI Road World Championships, and his team skipped the 1978 Tour de France, because they felt there were too many mountain finishes for a rider like Thurau. Although Thurau won two stages in the 1978 Giro, it did not go as expected, as he had to abandon the race in the tenth stage, when he had already given up all